I have FC16 installed and have been using minicom to connect to a cisco switch that I have to study for a CCNA. I was curious how I go about disconnecting the usb to serial converter from a USB port. Most usb stuff you can use umount but that does not seem to work in the case. What command safely allows me to remove this usb device. It uses console port ttyUSB0

There are no data writes going on (apart from possibly a log file) - or cached data that may be lost or corrupted (as would be with an external harddrive or usb stick) so pull that plug with confidence my friend